T36.AX1 — Poisoning by fluoroquinolone antibiotics, accidental (unintentional)

Not billable

Is T36.AX1 billable?

No — T36.AX1 is a non-billable header code. T36.AX1 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath T36.AX1.

Billable codes under this header

T36.AX1 at a glance

Code	T36.AX1
Description	Poisoning by fluoroquinolone antibiotics, accidental (unintentional)
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Inclusion terms

Alternative wording in documentation that is classified to T36.AX1.

Poisoning by fluoroquinolone antibiotics NOS

Excludes1 — never code together — inherited from T36-T50

The conditions below can never be reported together with T36.AX1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

toxic reaction to local anesthesia in pregnancy (O29.3-)

Excludes1 — never code together — inherited from T36

The conditions below can never be reported together with T36.AX1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

antineoplastic antibiotics (T45.1-)
locally applied antibiotic NEC (T49.0)
topically used antibiotic for ear, nose and throat (T49.6)
topically used antibiotic for eye (T49.5)

Code first — inherited from T36-T50

The underlying condition below must be sequenced before T36.AX1. T36.AX1 describes a manifestation and cannot be the principal or first-listed diagnosis.

, for adverse effects, the nature of the adverse effect, such as:
adverse effect NOS (T88.7)
aspirin gastritis (K29.-)
blood disorders (D56-D76)
contact dermatitis (L23-L25)
dermatitis due to substances taken internally (L27.-)
nephropathy (N14.0-N14.2)

Use additional code — inherited from Chapter 19

Report an additional code alongside T36.AX1 to fully describe the condition. T36.AX1 is sequenced first.

code to identify any retained foreign body, if applicable (Z18.-)

Use additional code — inherited from T36-T50

Report an additional code alongside T36.AX1 to fully describe the condition. T36.AX1 is sequenced first.

code(s) to specify:
manifestations of poisoning
underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
underdosing of medication regimen (Z91.12-, Z91.13-)

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of T36.AX1, but a patient may have both at the same time. When documentation supports it, T36.AX1 and the excluded code may both be reported.

birth trauma (P10-P15)
obstetric trauma (O70-O71)

Excludes2 — not included here — inherited from T36-T50